Immersion type side water injection nozzle capable of improving crystallizer flow field for continuous casting

A crystallizer and water nozzle technology, which is applied in casting equipment, casting melt containers, metal processing equipment, etc., to achieve the effects of optimizing heat distribution, improving heat transfer, and promoting high casting speed

Pending Publication Date: 2020-02-11
德龙钢铁有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In current production, reasonable control of the impact depth is particularly important to improve the flow field inside the mold, but it is still not possible to solve the two problems at the same time

Method used

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  • Immersion type side water injection nozzle capable of improving crystallizer flow field for continuous casting
  • Immersion type side water injection nozzle capable of improving crystallizer flow field for continuous casting
  • Immersion type side water injection nozzle capable of improving crystallizer flow field for continuous casting

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Embodiment Construction

[0018] see figure 1 , The continuous casting submerged side spout for improving the flow field of the mold according to the present invention is arranged in the mold, including symmetrically arranged main side holes 3, and the cross-sectional shape of the main side holes is square or rectangular. An important improvement of the present invention is that the upper surface of the main side hole has an upward inclination a1, and the lower surface has a downward inclination a2, the upward inclination is smaller than the downward inclination, and the difference between the upward inclination and the downward inclination is 3°-5°. Wherein, the degree of the upward inclination angle is not less than 10°, and the degree of the downward inclination angle is not greater than 20°. The main side holes are set with different upward and downward angles, and the upward angle is smaller than the downward angle, so that when the molten steel flows out from the two main side holes, the upward a...

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Abstract

The invention discloses an immersion type side water injection nozzle capable of improving a crystallizer flow field for continuous casting. The immersion type side water injection nozzle is arrangedinside a crystallizer and comprises symmetrically-formed main side holes. The cross sections of the main side holes are in a rectangular or square shape, the upper surfaces of the main side holes areprovided with upper dip angles a1, the lower surfaces of the main side holes are provided with lower dip angles a2, the degrees of the upper dip angles are smaller than the degrees of the lower dip angles, and the difference between the upper dip angles and the lower dip angles is 3-5 degrees. Auxiliary side holes are formed in the upper portions of the main side holes, and the flow area of the auxiliary side holes is 1 / 40-1 / 10 that of the main side holes. The immersion type side water injection nozzle has the beneficial effects that the auxiliary side holes are formed, some molten steel flowsout from the auxiliary side holes, upper heat output is improved, upper backflow heat transfer of the molten steel is improved, and the good foundation is supplied to increase of the insertion depthof the immersion type water nozzle; and due to the fact that the upper dip angles and the lower dip angles of the main side holes adopt different degrees, and the upper dip angles are smaller than thelower dip angles, molten steel streams flow back upwards to be reinforced, upper backflow molten steel heat transfer is further improved, and a heat flow field is optimized.

Description

technical field [0001] The invention relates to a device for optimizing the molten steel flow field of a crystallizer in the pouring process of a continuous casting machine, in particular to a submerged side spray nozzle for continuous casting that improves the flow field of the crystallizer. Background technique [0002] In the continuous casting production, the insertion depth of the submerged nozzle is an important production control parameter for continuous casting and pouring to ensure the quality of the slab. In the process of slab continuous casting, because the liquid level of the tundish has a certain height, when the molten steel enters the mold from the main side hole of the submerged nozzle, the molten steel stream has a certain speed and angle, and impacts the narrow surface of the mold. Then form the upper backflow and the lower backflow. The lower reflux forms a certain impact depth. If the impact depth is too deep, the high temperature zone in the crystalliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/50
CPCB22D41/50
Inventor 田宝生王杰文赵定国武献民霍立桥毕军建冯聚和杨帅赵伟锋张兵臣黄伟丽陈四平徐子谦牛跃威朱云杰朱红芳
Owner 德龙钢铁有限公司
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